[Yacoby]

Safety, how do you know the car is safe, what do you do if it has a leak, etc etc. A single unit that can be tested and properly maintained is a far better idea.

You also then require car ownership, with very specialised cars that only a few would be able to afford.

City design in Europe also seems for the most part to be trying to push cars out of cities. If I was going for a business meeting in London I would prefer not to have a car. Taxi and expenses would be far easier.